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        <title>Issue 4553: iframe should be content-primary</title>
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            <h1><a href="http://code.google.com/p/fbug/issues/detail?id=4553">Issue 4553</a>:
                iframe should be content-primary</h1>
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            <section id="content">
                <img src="a404.png" onerror="if (typeof(Components.classes) != 'undefined') alert(Components.classes);" alt=""/>
                <section id="output"></section>
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            <section id="description">
                <h3>Steps to reproduce</h3>
                <ol>
                    <li>Open Firebug</li>
                    <li>Switch to the Net panel and enable it</li>
                    <li>Reload the page</li>
                    <li>
                        Expand the request for <code>issue4553.html</code><br/>
                        <span class="ok">&rArr; An <em>HTML</em> tab should be shown for the request</span>
                    </li>
                    <li>Select the HTML tab. At this moment alert dialog MUST NOT be displayed.</li>
                </ol>
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            <footer>Sebastian Zartner, sebastianzartner@gmail.com</footer>
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